Pneumatic-tire mounting.



E. K. BAKER.

PNEU'MATiC TIRE MOUNTING.

APPLICATION FILED JULY I9. 1911.

Patent-ed Oct. 5, 1915.

2 SHEETS-SHEET I.

Patented Oct. 5, 1915.

2 SHEEISSHEET 2 nuurlrlln n i u FILED JULY I9. 19!].

E. K. BAKER.

PNEUMATIC TIRE MOUNTING.

APPLICATlOh ERLE K: BAKER, 0E CHICAGG, ILLINOId, ASSIGNOR 'lEO UNIVERSAL RIM CUMPANY, OF

CHICAGO, ILLINOIS, A CORPOBATIQN OF ILLINOIS.

PNEUMATKC-TI RE MOUNTING.

11,155,394. Original application filed July 8, 1911, Eeriel To all whom it may concern."

Be it known that I, ERLE K. BAKER, a citizen of the United States, and a resident of Chicago. Cook county, Illinois, have in vented certain new and useful Improve ments in Pneumatic-Tire Mooutings off which the following is a full, true, clear. and exact description. such as will enable ot skilled in the art to make and use the same.

My invention relates to improvements in automobile wheels having demountable rims, and has special reference to improvements in the wedging and clamping devices c0mmonly known as wedge lugs which are used for securing the rims upon such wheels.

This application is concerned with a formation or construction of the wedge lugs by which the latter are freed fnoni the rim and allowed to turn out of contact therewith and away therefrom as soon as the point or end of the wedge portion ofthe lug leaves the edge of the Wheel telly. l'he remainder of the structure herein shown and described is not claimed in this application but is both described and claimed in my earlier application. Serial No. 636,693, filed July 3rd, 1911, of which this application is a division.

My invention is disclosed in and will be most readily understood upon reference to the accompanying drawings which form part of this specification, and in which Figure 1 shows the outer side of an automobile wheel, rim and tire equipped with rim clamping and wadging devices, wedge lugs, embodying my invention. Fig. 2 is an enlarged transverse section of the wheel telly, telly band and a rim of ordinary formtogether with my novel clamp ing and wedging device in a. preferred form. Fig. 3 is a plan view of the parts shown in Fig. 2, a portion of the rim being broken away to disclose my novel wedge lug. Fig. at is a sectional. view similar to Fig. 2 showing the wedge lug at the moment it is freed from the telly and in the act of turningaway from the rim. Fig. 5 is a perspective view of the wedge lug.

The automobile. wheel as shown in the drawings comprises a hub 3. spokes a felly 5 and the metal felly band 6. An ordinary rim 7 for a pneumatic tire 8 is shown.

On the inner side, meaning toward the body of the automobile, the telly band 6 has the usual annular flange 6 to receive the rim. Wedge lugs in the past and would not in no Specification of Letters Eatent.

ts. castes. Divitisd and Serial No. GiltfiS f-S.

ners

Patented @ct. 5, 1915.

this application filed July 19, 1911.

The rim is larger than the telly band and there is a gap or annular space 9 between v the" two, in which the wedge lugs Work. There are several of these lugs spaced around the wheel as shown in Fig. 1. 'lhey serve to six port, center and fix the rim upon the wheel. I

At points A. in Fig. 1 the Wedge lugs are shown in working position. At point B the wedge lug is shown at the moment of disengagement from the rim and at point C the Wedge lug is shown swung down or in wardly out of the path of therim, as at moments when the rim is being placed upon or removed from the Wheel. In preferred form each of these devices comprises three'principal parts, to wit a threaded nut 10 ,iiastened to the back or inner side of the telly, a straight threaded bolt 11 which extends througha transverse hole in the telly be in both directions with the bolt so that the latter is employed to drive the wedge portion 12 of the wedge lug between the felly band and the rim to clamp the rim on the wheel. and is also used as a means for positively withdrawing; the wedge lug when it is desired to detach the rim.

As shown at 12* in Fig. 2 and in Fig. 5 the shank 12 of the wedge lug contains a hole or slot which is larger than the bolt. allowing the wedge lug such freedom of movement with respect to the bolt that it may adjust itself to the rim and felly band without side strains on the bolt.

D represents a. socket wrench which fits the bolt head, and which is ordinarily used for turning the bolt to operate the clamping device. The wedge'portion of the wedge lug is wide and flat, extending a considerable distance on both sides of the bolt so that the radial distance from the bolt to the ends or corners of the wedge portion is greater than the medial or shortest radius of the lug. \Vhile'irom the sectional. view of the device it would appear that the lug might be turned down out of the way of the rim as soon as drawn back far enough for the end 12 of the wedge to escape the edge of the felly band, this'has not been the case with such By this ar-= rangement the wedge lug is made movable this presen instance be true were i; not for ihe peculiar manner in which 1 form or construcethe Wedge port-ion of the Wedge iuf The ring being Wider than the folly of the wheel overhangs "the sun. and if the Wedge lug were symmetrical in forn'iefiion the ends or corners of the lug would still remain in contact with the rim after being freed from the folly. As the rim cannot be removed until the Wedge h1g2; is taken out. oi its path it would thus he necessary to loosen or slack off the lug for enough to carry +she whole lug beyond the rim. would involve an ohjeci ionzibly lone; hoh; or the entire removal of the part hoiding the lug and would also involve an unnecessarily protracted operation in the placing and replacing of the rim. To avoid this difficulty I eocentrioelly offset the wedging portion with. respect to the projected axis of the holi;

hole in "the shank and the medial radial plane which includes said axis. Thus as here shown, 1 cut ofi? or bevel one corner or end of the Wedge as shown at 12. The angle begins virtually at the middie of the edge point 12 and ends at fih'e juncture of the wedge ondshenk portions. Thus one end of the lug is cut away and anode to conform to and escape the overhanging rim from the moment that the point; of the Wedge is moved back out of contact with the folly hand. This action is cieerly disclosed in Fig. in consequence ihe outward turning of the inn" holding member (in this case the hoit) results in automatically burning the wedge hie; cm; oi contact Wiilii and out messing of the path of rho rim as soon :is timing is backed off the short (listencerequired to free ii; from the felly. In practice the lug when turned down in this Way is thus lefton the bolt until the rim is ready to fasten again whereupon the first turning ofthe bolt results in throi-ving the Wedge around into locking position in readiness to enter the gap or space between the rim and felly. Uhvionsly this invention renders the Whole clamping device compact and practical to the exteni of enabling the'useof smaller parts than usual and permitting them to remain on the wheel insiead of being removed with the lug in the ordinary manner.

It will at once he appereni; that this invention is of distinct utility with clumping arrangements of oiher forms than herein shown. 7

Having izhus described my invention I claim as new and desire to secure by Letters Patent:

The herein described improvement com prising n demountnhle-rim wedge-lug composed of :1V shank iiortion having: a, holt hoiov and :r unitury wede oportion suhstnntiuiiy pnroilel with,thejgrojectoil axis oi said hole and eceentricailyonset with respect thereto, for the purpose specified.

in testimony whereof, I have hereunto set my hand, this iiitl day of July, 1911, in vthe presence of two subscribing \vitnossws.

' .ERLE KJBA-IIER.

(V i messes lfinwlum l Vinson, JOHN R. Lnrnvne. 

